WALTHAM, Mass. – March 27, 2014– EuroSite Power Inc., (OTCQB: EUSP) an On-Site Utility solutions provider, offering clean electricity, heat, hot water and cooling solutions to hospitality, healthcare, housing and leisure centres in the United Kingdom (UK) and Europe, is now operating a 100kW combined heat and power (CHP) system at Bury St Edmunds Leisure Centre in Suffolk, UK. The agreement will provide an estimated at 2.2 million GBP (US$3.6 million) over the life of the contract.

Abbeycroft Leisure is already enjoying the benefit of EuroSite Power’s guaranteed low price, low carbon energy at their Haverhill Leisure Centre site and signed a contract to replace their aged CHP installation at Bury St Edmunds in July 2013. The newly operational 100kW CHP system at Bury St Edmunds will generate approximately 1.6GWh of total energy per annum while saving up to 240 tonnes of CO2 each year.

Commenting on the announcement, Paul Hamblyn, Managing Director of EuroSite Power, said: “As we fund the installation and operation of our On-Site Utility solutions the customer starts saving from the very first day of operation so Abbeycroft Leisure has already started saving. Of course they have already permanently lowered energy costs at their Haverhill site following the installation of one of our systems and with Bury St Edmunds now operating they can look forward to reduced operating costs here too.”

Simon Ginders-Coxshall, Operations Director of Abbeycroft Leisure and Anglia Community Leisure said: “Like any business we need to keep our operating costs under control and as energy prices continue to rise we needed to find a solution to keep these rises under control too. EuroSite Power’s combination of zero upfront capital cost with pay-as-you-go energy has proven the ideal solution.”

On-Site Utility

EuroSite Power sells the energy produced from an onsite energy system to an individual property as an alternative to the outright sale of energy equipment. On-Site Utility™ solution customers only pay for the energy produced by the system and receive a guaranteed discount rate on the price of the energy. All system capital, installation, operating expenses and support are paid by EuroSite Power.

About EuroSite Power

EuroSite Power Limited is a subsidiary of American DG Energy Inc. (NYSE MKT: ADGE). The Company provides institutional, commercial and small industrial facilities with clean, reliable power, cooling, heat and hot water at lower costs than charged by conventional energy suppliers – without any capital or start-up costs to the energy user. More information can be found at www.eurositepower.co.uk.

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FORWARD-LOOKING STATEMENTS

This press release contains forward-looking statements under the Private Securities Litigation Reform Act of 1995 that involve a number of risks and uncertainties. Important factors could cause actual results to differ materially from those indicated by such forward-looking statements, as disclosed on the Company’s website and in Securities and Exchange Commission filings. This press release does not constitute an offer to buy or sell securities by the Company, its subsidiaries or any associated party and is meant purely for informational purposes. The statements in this press release are made as of the date of this press release, even if subsequently made available by the Company on its website or otherwise. The Company does not assume any obligation to update the forward-looking statements provided to reflect events that occur or circumstances that exist after the date on which they were made.